We have a Support Tool that will gather relevant information for us to debug the issue. Could you please download and execute it on the machine where the stack is running by following the steps described in the guide below?

Please note that you need to paste the code outputted by the tool in your reply.

We also developed a tool to detect SSL issues. It will analyse your SSL configuration in Apache. It will show which certificate file is being used, the domain name it has, whether the key and certificate match and will also check the server certificate. Execute these commands inside your instance (connect through SSH).